Wind uplift monitoring device and method for existing steel structure metal roof

Abstract

The invention discloses an existing steel structure metal roof wind uplift monitoring device and method, and relates to the technical field of wind uplift monitoring, the existing steel structure metal roof wind uplift monitoring device comprises a stay wire type displacement sensor, a steel strand and an anemograph, the steel strand is fixed on the surface of a metal roof panel in a tensioned state, and the stay wire type displacement sensor is arranged at the midspan position of the steel strand; the anemograph is used for measuring a wind speed value in real time, and the stay wire type displacement sensor is used for working when the wind speed value exceeds an early warning value and collecting the displacement of the steel strand in real time. The steel strand and the metal roof board can be stably fixed, and the installation process is simple; whether the wind uplift risk exists or not is judged according to the relation between the deflection value change and the time, effective monitoring of wind uplift is achieved, and the application range can be widened.

Description

Technical Field

[0001] This invention relates to the field of wind uplift monitoring technology, and in particular to a wind uplift monitoring device and method for existing steel structure metal roofs. Background Technology

[0002] Metal roofing panels offer advantages such as light weight and ease of construction. However, with increasing service life and constant exposure to complex weather conditions, metal roofs are prone to deformation and wind uplift. Traditional metal roof wind uplift monitoring devices typically employ embedded or snap-on installation methods, often requiring the removal of the metal roof for reinstallation, which is both difficult and costly. Furthermore, risk warnings for metal roof monitoring usually use the mid-span deflection as an indicator, but the warning value for mid-span deflection is difficult to quantify under different material types, support conditions, and spans. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a wind uplift monitoring device and method for existing steel structure metal roofs, which can achieve stable fixing of steel strands to metal roof panels and has a simple installation process; it can determine the existence of wind uplift risk by measuring the relationship between deflection value changes and time, thus achieving effective monitoring of wind uplift and increasing the scope of application.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, embodiments of the present invention provide a wind uplift monitoring device for existing steel structure metal roofs, including a pull-wire displacement sensor, a steel strand, and an anemometer. The steel strand is fixed to the surface of the metal roof panel in a taut state, and the pull-wire displacement sensor is arranged at the mid-span of the steel strand. The anemometer is used to measure the wind speed value in real time, and the pull-wire displacement sensor is used to operate when the wind speed value exceeds the warning value and to collect the displacement of the steel strand in real time.

[0005] As a further implementation, the steel strand is bonded and fixed to the metal roof panel with epoxy resin adhesive, and both ends of the steel strand are fixed to the metal roof panel through connecting components.

[0006] As a further implementation, the connecting assembly includes a metal sheet, a backing plate, and a clamping bolt, with a clamping space for the steel strand formed between the metal sheet and the backing plate, and the metal sheet and the backing plate connected by the clamping bolt.

[0007] As a further implementation, the pad is bonded and fixed to the metal roof panel with epoxy resin adhesive.

[0008] As a further implementation, a cloud server is also included, which is used to calculate the deflection difference based on the measurement data of the wire displacement sensor, so as to determine the risk of wind exposure based on the relationship between the numerical change and time.

[0009] As a further implementation, a solar photovoltaic panel is also included, with the anemometer and wire-type displacement sensor connected to the solar photovoltaic panel.

[0010] Secondly, embodiments of the present invention also provide a method for monitoring wind uplift of existing steel structure metal roofs, employing the aforementioned wind uplift monitoring device, comprising: The anemometer collects wind speed values ​​in real time. When the wind speed value exceeds the warning value, the pull-wire displacement sensor is activated. The wire-type displacement sensor transmits the real-time collected displacement data to a cloud server, which then analyzes the real-time deflection data. 2 and the deflection in the previous second 1. Calculate the deflection difference And based on the deflection difference With time The relationship between t and t is used to determine whether there is a risk of exposure.

[0011] As a further implementation, the mid-span deflection of the metal roof panel is expressed as: ; in, The value represents the lifting angle of the metal roof panel under wind load, L represents the initial length of the wire of the wire displacement sensor, and δL represents the measured value of the wire displacement sensor.

[0012] As a further implementation, the relationship between the deflection difference and time is as follows: At that time, there is no risk of wind uplift for the metal roof panels; the relationship between the deflection difference and time is as follows: At that time, metal roof panels posed a risk of wind deflection; Where k and a represent set values.

[0013] As a further implementation, the anemometer is installed at the location of maximum wind speed on the steel structure roof; the steel strands are arranged perpendicular to the purlin direction.

[0014] The beneficial effects of this invention are as follows: (1) The wind uplift monitoring device of the present invention mainly includes a pull-wire displacement sensor, a steel strand, and an anemometer. The steel strand is fixed to the surface of the metal roof panel in a taut state. The anemometer is used to measure the wind speed value in real time. The pull-wire displacement sensor is used to work when the wind speed value exceeds the warning value and to collect the displacement of the steel strand in real time. The wind uplift monitoring is carried out by the cooperation of the anemometer and the pull-wire displacement sensor.

[0015] (2) The steel strand of the present invention is closely attached to the surface of the metal roof panel and fixed. The two ends of the steel strand are fixed by the connecting components attached to the metal roof panel, which ensures the installation of the steel strand firmly and the installation process is relatively simple.

[0016] (3) The wire-type displacement sensor of the present invention transmits the real-time collected displacement data to the cloud server, and the cloud server transmits the data according to the real-time deflection. 2 and deflection in the previous second 1. Calculate the deflection difference And based on the deflection difference With time The relationship between t and time is used to determine whether there is a risk of wind uplift. This method can identify the risk of wind uplift by analyzing the relationship between the change of deflection value and time. It can avoid a lot of finite element calculations and is applicable to different spans, connection methods and types of metal roofing panels. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 This is a schematic diagram of the wind-blown monitoring device according to one or more embodiments of the present invention; Figure 2 yes Figure 1 Schematic diagram of section aa; Figure 3 This is a schematic diagram of the connection component structure according to one or more embodiments of the present invention; Figure 4 yes Figure 3 Schematic diagram of the bb cross section.

[0019] Among them, 1. wire-type displacement sensor, 2. steel strand, 3. connecting component, 4. metal roof panel, 5. rubber layer, 6. purlin, 7. wire, 8. solar photovoltaic panel, 9. anemometer, 10. cloud server, 11. clamping bolt, 12. pad, 13. metal sheet. Detailed Implementation

[0020] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] Example 1: This embodiment provides a wind uplift monitoring device for existing steel structure metal roofs, such as... Figure 1 and Figure 2As shown, the system includes a wire-type displacement sensor 1, steel strands 2, an anemometer 9, and a cloud server 10. The anemometer 9 is installed at the location of maximum wind speed on the steel structure roof to collect wind speed values ​​in real time. Multiple steel strands 2 are installed on the surface of the metal roof panel 4, and the direction of the steel strands 2 is perpendicular to the direction of the purlins 6. The number of steel strands 2 is set according to the area of ​​the metal roof panel 4 and the number of purlins 6. The wire-type displacement sensor 1 is installed at the mid-span of the steel strands 2.

[0022] Under normal conditions, the anemometer 9 operates in real-time, continuously collecting on-site wind speed data and transmitting the values ​​to the cloud server 10. The wire-type displacement sensor 1 is in a silent, power-saving state, not collecting data. When the wind speed exceeds a warning threshold, the wire-type displacement sensor 1 activates, begins collecting displacement data from the steel strand 2, and transmits it to the server. Once the wind speed falls below the warning threshold, the wire-type displacement sensor 1 returns to a silent state, awaiting its next activation.

[0023] To ensure accurate measurement of the state of the steel strand 2 by the pull-wire sensor, the steel strand 2 is fixed to the surface of the metal roof panel 4 in a taut state. In this embodiment, the main body of the steel strand 2 is glued to the metal roof panel 4 with epoxy resin, and both ends of the steel strand 2 are fixed to the metal roof panel 4 by connecting components 3, so as to achieve effective fixation between the steel strand 2 and the metal roof panel 4, allowing the steel strand 2 and the metal roof panel 4 to share the load.

[0024] like Figure 3 and Figure 4 As shown, the connecting assembly 3 includes a metal sheet 13, a pad 12, and clamping bolts 11. The pad 12 is a flat plate, and the metal sheet 13 is a U-shaped structure. The upper surfaces of the metal sheet 13 and the pad 12 form an installation space for the steel strand 2, which passes through the installation space. Both ends of the metal sheet 13 are connected to the pad 12 via clamping bolts 11. To fix the pull wire 7 of the pull-wire sensor, the pull wire 7 also passes through the aforementioned installation space. After the ends of the steel strand 2 and the pull wire 7 are clamped to the metal sheet 13 and the pad 12, the bottom surface of the pad 12 is glued to the purlins 6 of the metal roof panel 4 using epoxy resin adhesive.

[0025] like Figure 1 As shown, the wind monitoring device in this embodiment also includes a solar photovoltaic panel 8, an anemometer 9 and a wire-type displacement sensor 1 connected to the solar photovoltaic panel 8. The solar photovoltaic panel 8 can be fixed to the steel structure by bolts or welding, and the solar photovoltaic panel 8 supplies power to the anemometer 9 and the wire-type displacement sensor 1.

[0026] In this embodiment, the cloud server 10 is used to receive wind speed values ​​and displacement values, and calculate the deflection difference based on the measurement data of the wire-type displacement sensor 1, so as to judge the risk of wind uplift based on the relationship between the value change and time.

[0027] In this embodiment, the steel strand 2 is fixed to the surface of the metal roof panel 4 in a taut state and is fixed by epoxy resin adhesive and connecting components 3. During the installation process, it is not necessary to remove the original structural components and avoid a large amount of welding work during the installation process; it can effectively monitor the risk of wind uplift.

[0028] Example 2: This embodiment provides a method for monitoring wind uplift of existing steel structure metal roofs, using the wind uplift monitoring device described in Embodiment 1, including: Step 1: Install the wind-blown monitoring device.

[0029] Step 1.1: Install an anemometer 9 at the location of maximum wind speed on the steel structure roof, then attach SBS waterproof material to the bottom of the anemometer 9, and then apply a certain thickness of waterproof mortar; in this embodiment, the thickness of the waterproof mortar is 2mm.

[0030] Step 1.2: Determine the number of steel strands 2 and wire-type displacement sensors 1 based on the area of ​​the metal roof of the steel structure roof. In this embodiment, the diameter of the steel strands 2 is 6mm, and the material is galvanized steel strands 2.

[0031] The steel strand 2 is arranged perpendicular to the purlin 6. After the steel strand 2 is tightened and tightly bonded to the metal roof panel 4, epoxy resin adhesive is used to bond the steel strand 2 and the metal roof panel 4 together. For both ends of the steel strand 2, the pad 12 is first bonded to the purlin 6 with epoxy resin adhesive. Then, the steel strand 2 is passed between the metal sheet 13 and the pad 12, and the clamping bolts 11 are tightened. After installation, the rubber layer 5 and SBS waterproof material are sequentially pasted on the outside of the connecting assembly 3, and a certain thickness of waterproof mortar is applied.

[0032] Step 1.3: Install the pull-wire displacement sensor 1 in the middle of the steel strand 2 span, and glue the pull wire 7 to the steel strand 2 with epoxy resin; fix the end of the pull wire 7 together with the steel strand 2 to the connecting component 3.

[0033] Step 1.4: Install solar photovoltaic panels 8 on the steel structure roof. The installation location of the solar photovoltaic panels 8 depends on the lighting requirements. Apply SBS waterproof material to the bottom of the solar photovoltaic panels 8 and then apply waterproof mortar. Connect the anemometer 9 and the wire-type displacement sensor 1 to the solar photovoltaic panels 8 and the cloud server 10 via wiring.

[0034] Step 2: Pre-set the warning value for the anemometer 9. The warning value is determined by combining the wind characteristics of different regions with finite element analysis. Under normal conditions, the anemometer 9 collects wind speed values ​​in real time and uploads them to the cloud server 10. When the wind speed value exceeds the warning value, it indicates that the wind speed on site is relatively high, and it is necessary to prevent the metal roof from falling off and being blown up by the wind. The wire displacement sensor 1 is activated to collect the displacement of the steel strand 2 in real time.

[0035] The initial length of the wire-type displacement sensor 1 is L, the measured data of the wire-type displacement sensor 1 is δL, and the lifting angle of the metal roof panel 4 under wind load is... The mid-span deflection of metal roof panel 4 is .

[0036] Step 3: Extract real-time deflection from cloud server 10 2. Deflection in the first second 1. Calculate the deflection difference. = And based on the deflection difference With time The relationship between t and t is used to determine whether there is a risk of exposure.

[0037] When the relationship between deflection difference and time is When k is a fixed value, ranging from 0 to 100, it indicates that the mid-span deflection of the metal roof panel 4 does not change abruptly with wind speed and time, and the two are still linearly related. The metal roof panel 4 is still in an elastic state and there is no risk of it falling off or being lifted.

[0038] When the relationship between deflection difference and time is When, where a is a fixed value, its value ranges from 1 to 9, it indicates that the mid-span deflection of the metal roof panel 4 changes abruptly with the changes in wind speed and time. The metal roof panel 4 is in a plastic state, and the magnitude of the deflection will increase exponentially with the development of time. There is a risk that the metal roof panel 4 will fall off or be lifted, and timely warning and handling are required.

[0039] This embodiment determines the existence of wind uplift risk by changing the deflection value over time, which can avoid a large number of finite element calculations, and is applicable to different spans, connection methods and board types of metal roof panels 4.

[0040] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A wind uplift monitoring device for existing steel structure metal roofs, characterized in that, The device includes a wire-type displacement sensor, a steel strand, and an anemometer. The steel strand is fixed to the surface of the metal roof panel in a taut state, and the wire-type displacement sensor is arranged at the mid-span of the steel strand. The anemometer is used to measure the wind speed value in real time, and the wire-type displacement sensor is used to collect the displacement of the steel strand in real time when the wind speed value exceeds the warning value.

2. The wind uplift monitoring device for existing steel structure metal roofs according to claim 1, characterized in that, The steel strand is bonded and fixed to the metal roof panel with epoxy resin adhesive, and both ends of the steel strand are fixed to the metal roof panel through connecting components.

3. The wind uplift monitoring device for existing steel structure metal roofs according to claim 2, characterized in that, The connecting assembly includes a metal sheet, a backing plate, and a clamping bolt. A clamping space for the steel strand is formed between the metal sheet and the backing plate, and the metal sheet and the backing plate are connected by the clamping bolt.

4. The wind uplift monitoring device for existing steel structure metal roofs according to claim 3, characterized in that, The pad is fixed to the metal roof panel by epoxy resin adhesive.

5. A wind uplift monitoring device for existing steel structure metal roofs according to claim 1, characterized in that, It also includes a cloud server, which is used to calculate the deflection difference based on the measurement data of the wire displacement sensor, so as to judge the risk of wind exposure based on the relationship between the numerical change and time.

6. The wind uplift monitoring device for existing steel structure metal roofs according to claim 1, characterized in that, It also includes a solar photovoltaic panel, and the anemometer and wire-type displacement sensor are connected to the solar photovoltaic panel.

7. A method for monitoring wind uplift of existing steel structure metal roofs, characterized in that, The wind-induced uplift monitoring device as described in any one of claims 1-6 includes: The anemometer collects wind speed values ​​in real time. When the wind speed value exceeds the warning value, the pull-wire displacement sensor is activated. The wire-type displacement sensor transmits the real-time collected displacement data to a cloud server, which then analyzes the real-time deflection data. 2 and the deflection in the previous second 1. Calculate the deflection difference And based on the deflection difference With time The relationship between t and t is used to determine whether there is a risk of exposure.

8. A method for monitoring wind uplift of existing steel structure metal roofs according to claim 7, characterized in that, The mid-span deflection of the metal roof panel is expressed as: ； in, The value represents the lifting angle of the metal roof panel under wind load, L represents the initial length of the wire of the wire displacement sensor, and δL represents the measured value of the wire displacement sensor.

9. A method for monitoring wind uplift of existing steel structure metal roofs according to claim 7, characterized in that, The relationship between the deflection difference and time is as follows: At that time, there is no risk of wind uplift for the metal roof panels; the relationship between the deflection difference and time is as follows: At that time, metal roof panels posed a risk of wind damage. Where k and a represent set values.

10. A method for monitoring wind uplift of existing steel structure metal roofs according to claim 7, characterized in that, The anemometer is installed at the location of maximum wind speed on the steel structure roof; the steel strands are arranged perpendicular to the purlin direction.

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